Zoltán Marosi

Partner
Co-Head of Competition and Antitrust, Hungary
We have been working with Zoltán Marosi for many years. He is a trusted, top-tier advisor in the field of competition law. His valuable insights and advice contributed to our business success in multiple instances.
— Legal 500, 2025
Budapest
About

Zoltán Marosi has more than 20 year of experience in handling complex Hungarian and EU antitrust law, consumer protection law and administrative litigation cases.

Zoltán Marosi worked in the Budapest office of Freshfields Bruckhaus Deringer and at Oppenheim Budapest Office where he left as a Partner.

He has published numerous articles and book excerpts in the fields of competition law, commercial law and European Union law. Zoltán is currently a lecturer of EU law and EU competition law at ELTE School of Law, the head of the European and International Law Section at the Bibó College of Law and serves as a member of the Hungarian committee of bar examiners. Furthermore, he is an officer of the International Bar Association, serving on its Antitrust Committee acting as speaker and moderator at numerous prestigious conferences organised both in Europe and beyond.

Areas of FocusLitigation, Arbitration and InvestigationsAntitrust and CompetitionTelecoms
Professional QualificationsLawyer (Ügyvéd) admitted to the Budapest Bar Association (Budapesti Ügyvédi Kamara), 2007
Languages
  • Hungarian
  • English
  • German
  • Russian

Recognitions

  • We have been working with Zoltán Marosi for many years. He is a trusted, top-tier advisor in the field of competition law. His valuable insights and advice contributed to our business success in multiple instances. – Legal 500, 2025
  • Zoltán Marosi is a very well connected, outstandingly responsive and supportive partner. – Chambers Europe 2025
  • Zoltán Marosi is a client focused and highly professional adviser. – Legal 500, 2024
  • Zoltán is clearly one of the most prepared advisors who is able to find business-oriented solutions. – Chambers Europe, 2024
  • He is definitely one of the best competition lawyers. – Chambers Europe, 2023
  • Zoltán Marosi has an excellent standing in the market for his advice to clients on consumer protection cases involving unfair commercial practices. He further represents clients from a multitude of industries on merger control matters. One interviewee comments: Zoltán is very smart and works well with the team. – Chambers Europe, 2022
Education
  • J.D., Eötvös Loránd University, Faculty of Law, Budapest, Hungary
  • MJur, University of Oxford European and Comparative Law

Insight Overview

Publications

  • ”Competition and competition regulation on the natural gas market” in the annual publication, Verseny és Szabályozás (2022)  (with Gábor Fejes)
  • Information Exchange and Related Risks, edited by Zoltan Marosi and Marcio Soares with a Foreword by Anthony M. Collins (Court of Justice of the European Union), published in cooperation with the International Bar Association
  • Chapter on Hungary/ sanctions (with Árpád Hargita) in Kellezi, Kilpatrick, Kobel (eds): Liability for Antitrust Law Infringements & Protection of IP Rights in Distribution, 2019
  • Various contributions to Practical Law Multijurisdictional Newsletter (summaries of Hungarian cases).
  • Various contributions to Oxford University Press – Competition: https://oxcat.ouplaw.com/
  • Blogposts on the first Hungarian competition law blog (in Hungarian): www.jogiforum.hu/versenyjog, tulnagyaverseny.blog.hu

Seminars

  • E-Commerce Hungary competition authority "meetup": recent questions in e-commerce and consumer protection (webinar, 13 January 2022.)
  • Hungarian Competition Authority mini-conference on latest developments in relation to the judicial review of the authority's decisions (webinar, 9 November 2021)
  • European Competition Lawyers Association conference: "Protect the consumers, fairness in competition, a new paradigm?" (Madrid, Spain, 1 October 2021)
  • International Bar Association, 25th Annual Competition Conference: recent developments in international merger control (moderator, Florence, Italy, 1 September 2021)
  • Hungarian Association of British Alumni: The application of competition law to Big Tech (webinar, 26 May 2021)
  • University of Nottigham guest talk: Hungarian cases concerning EU state aid law (webinar, 23 April 2021)
  • E-Commerce Hungary webinar on the future of e-commerce's legal framework (webinar, 8 April 2021)
  • Discussion at the Hungarian Competition Law Association on the procedural changes brought about by the ECN+ directive (3 March 2021., webinar)
  • International Competition Network conference, "Leniency perspectives from the private bar" (moderator) (webinar, 11 November 2020)
  • Association of Public Procurement Advisors conference on public procurement and cartel challenges (webinar, 4 November 2020)
 

Rankings and Awards

  • Chambers Europe, 2022 - 2025, Competition/Antitrust, (Individual Rankings): Band 1
  • Legal 500, 2021 - 2025, Competition, (Individual Rankings): Hall of Fame
  • Global Competition Review, 2021 - 2025, Competition, (Individual Rankings): Elite
  • Lexology Index, Thought Leaders, 2021 - 2025, Competition

Memberships And Affiliations

  • Officer of the International Bar Association, serving on its Antitrust Committee
  • Non-Governmental Advisor at the International Competition Network
  • Member of the Hungarian Competition Law Association
  • Member of the Hungarian committee of bar examiners
  • Board member of the Hungarian Association of British Alumni

My latest insights

Publication

Shrinkflation: A Global Legal Response to a Growing Consumer Concern

4 June 2025 .3 minute read

Publication

Predictably uncertain: Managing merger control call-in risk at local level in the EU

2 April 2025 .1 minute read

Publication

Navigating EU and national regulatory scrutiny in so called “killer acquisitions”

4 September 2024 .15 minute read

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Phone

+36 1 510 1100
(Work, Budapest)